@redocly/openapi-core/lib/rules/common/no-required-schema-properties-undefined.js

See https://github.com/Redocly/redocly-cli

import { isRef } from '../../ref-utils.js';
import { getOwn } from '../../utils.js';
export const NoRequiredSchemaPropertiesUndefined = () => {
    return {
        Schema: {
            enter(schema, { location, report, resolve }) {
                if (!schema.required)
                    return;
                const visitedSchemas = new Set();
                const elevateProperties = (schema, from) => {
                    // Check if the schema has been visited before processing it
                    if (visitedSchemas.has(schema)) {
                        return {};
                    }
                    visitedSchemas.add(schema);
                    if (isRef(schema)) {
                        const resolved = resolve(schema, from);
                        return elevateProperties(resolved.node, resolved.location?.source.absoluteRef);
                    }
                    return Object.assign({}, schema.properties, ...(schema.allOf?.map((s) => elevateProperties(s, from)) ?? []), ...(schema.anyOf?.map((s) => elevateProperties(s, from)) ?? []));
                };
                const allProperties = elevateProperties(schema);
                for (const [i, requiredProperty] of schema.required.entries()) {
                    if (!allProperties || getOwn(allProperties, requiredProperty) === undefined) {
                        report({
                            message: `Required property '${requiredProperty}' is undefined.`,
                            location: location.child(['required', i]),
                        });
                    }
                }
            },
        },
    };
};
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